Home / 21,228.48-31,840.29-6,439.50

Finding the Fourth Proportional to 21,228.48, 31,840.29 and 6,439.50

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Solution

The fourth proportional to 21,228.48, 31,840.29 and 6,439.50 is: 9,658.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.48 : 31,840.29 = 6,439.50 : x
  2. Step 2: Convert to fraction form
    21,228.48/31,840.29 = 6,439.50/x
  3. Step 3: Cross multiply
    21,228.48x = 31,840.29 × 6,439.50
  4. Step 4: Simplify right side
    21,228.48x = 205,035,547.46
  5. Step 5: Solve for x
    x = 205,035,547.46/21,228.48
  6. Step 6: Final answer
    x = 9,658.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.